Tapio Lempiäinen, Dorota Muth-Pawlak, Julia P Vainonen, Eevi Rintamäki, Mikko Tikkanen, Eva-Mari Aro
{"title":"Moderate Temperature Reduction Changes the High-Light Acclimation Strategy of Lettuce Plants.","authors":"Tapio Lempiäinen, Dorota Muth-Pawlak, Julia P Vainonen, Eevi Rintamäki, Mikko Tikkanen, Eva-Mari Aro","doi":"10.1111/ppl.70298","DOIUrl":"10.1111/ppl.70298","url":null,"abstract":"<p><p>In nature, environmental conditions are constantly changing, requiring plants to have numerous regulatory mechanisms to keep light harvesting and metabolism in balance. Here, we show that high light (HL) induces a much stronger non-photochemical quenching (NPQ) when lettuce plants are exposed to 1500 μmol photons m<sup>-2</sup> s<sup>-1</sup> for 4 h at 13°C (low temperature, LT) compared to 23°C (growth temperature, GT). GT/HL treatment induced NPQ to relax during 1 h in darkness. In contrast, LT/HL treatment induced an exceptionally high NPQ that only partially relaxed during 1 h in darkness at GT. Such a high sustained NPQ (sNPQ) cannot be explained by the canonical NPQ mechanism(s). Instead, sNPQ was associated with a transient increase in phosphorylation of minor LHCII antenna proteins, LHCB4.1/LHCB4.2 and partial disassembly of PSII-LHCII complexes. This coincided with increased expression of the light-harvesting-like proteins SEP2 and ELIP1.2, the PSII assembly proteins HCF173 and LPA3, and accumulation of the pre-D1 protein, indicating delayed PSII repair. These results lead us to propose that under LT/HL, the phosphorylation of LHCB4.1/LHCB4.2 initiates the disassembly of PSII-LHCII supercomplexes, allowing accumulated SEP2 to bind to CP47, presumably leading to quenching of the inner PSII core antenna. The free CP43 core antenna, released from PSII at an early stage of repair, is proposed to be protected by accumulated LPA3. Apparently, the cascades of regulatory mechanisms are specific to each combination of environmental changes, depending on their concomitant effects on chloroplast redox balance and PSII repair rate, with induced PSII core antenna quenching contributing to sNPQ.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 3","pages":"e70298"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12130749/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144209167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kinga Böde, Andrea Trotta, Ondřej Dlouhý, Uroš Javornik, Virpi Paakkarinen, Hiroaki Fujii, Ildikó Domonkos, Ottó Zsiros, Janez Plavec, Vladimír Špunda, Eva-Mari Aro, Győző Garab
{"title":"Lipid Phase Behaviour of the Curvature Region of Thylakoid Membranes of Spinacia oleracea.","authors":"Kinga Böde, Andrea Trotta, Ondřej Dlouhý, Uroš Javornik, Virpi Paakkarinen, Hiroaki Fujii, Ildikó Domonkos, Ottó Zsiros, Janez Plavec, Vladimír Špunda, Eva-Mari Aro, Győző Garab","doi":"10.1111/ppl.70289","DOIUrl":"10.1111/ppl.70289","url":null,"abstract":"<p><p>Thylakoid membranes (TMs) of oxygenic photosynthetic organisms are flat membrane vesicles, which form highly organised, interconnected membrane networks. In vascular plants, they are differentiated into stacked and unstacked regions, the grana and stroma lamellae, respectively; they are densely packed with protein complexes performing the light reactions of photosynthesis and generating a proton motive force (pmf). The maintenance of pmf and its utilisation for ATP synthesis requires sealing the TMs at their highly curved regions (CRs). These regions are devoid of chlorophyll-containing proteins but contain the curvature-inducing CURVATURE THYLAKOID1 (CURT1) proteins and are enriched in lipids. Because of the highly curved nature of this region, at the margins of grana and stroma TMs, the molecular organisation of lipid molecules is likely to possess distinct features compared to those in the major TM domains. To clarify this question, we isolated CR fractions from Spinacia oleracea and, using BN-PAGE and western blot analysis, verified that they are enriched in CURT1 proteins and in lipids. The lipid phase behaviour of these fractions was fingerprinted with <sup>31</sup>P-NMR spectroscopy, which revealed that the bulk lipid molecules assume a non-bilayer, isotropic lipid phase. This finding underpins the importance of the main, non-bilayer lipid species, monogalactosyldiacylglycerol, of TMs in their self-assembly and functional activity.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 3","pages":"e70289"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12172141/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144317660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Davide Marzi, Maria Luisa Antenozio, Roberta Ghelli, Valentina Cecchetti, Francesca Romana Iacobini, Marzia Beccaccioli, Massimo Reverberi, Maurizio Enea Picarella, Andrea Mazzucato, Patrizia Brunetti, Maura Cardarelli
{"title":"Primary Auxin Response Genes GH3s and DAO1 Modulate Stamen Elongation in Arabidopsis thaliana and Solanum lycopersicum.","authors":"Davide Marzi, Maria Luisa Antenozio, Roberta Ghelli, Valentina Cecchetti, Francesca Romana Iacobini, Marzia Beccaccioli, Massimo Reverberi, Maurizio Enea Picarella, Andrea Mazzucato, Patrizia Brunetti, Maura Cardarelli","doi":"10.1111/ppl.70340","DOIUrl":"10.1111/ppl.70340","url":null,"abstract":"<p><p>Late stamen development is mainly regulated by auxin, which acts through the Auxin Response Factor 8 (ARF8) to promote stamen elongation in Arabidopsis thaliana. Auxin concentration in the stamens peaks at the beginning of late development and then declines, but the contribution of auxin inactivation to auxin homeostasis in stamen has never been determined. In this study, we show that the expression of the acyl amido synthetases AtGH3.3, AtGH3.5, and AtGH3.6 (AtGH3s), which are involved in the conjugation of indole-3-acetic acid (IAA) with amino acids, is repressed, while the IAA oxidase AtDAO1 is upregulated in Arabidopsis arf8-7 stamens. The gh3s triple mutants exhibit a 24% increased stamen length, while gh3s and dao1 single mutants develop stamens with a reduced length of about 4% and 21%, respectively. We show that AtGH3s transcription is upregulated in dao1 stamens, whereas AtDAO1 expression is reduced in gh3s triple mutant stamens. Consistent with the long stamen phenotype, gh3s flower buds contain increased levels of free IAA and decreased levels of IAA-Asp. We also show that genes orthologous to AtARF8, AtGH3s and AtDAO1 are expressed in tomato stamens during flower development. We show that SlGH3s expression is mainly increased, while that of SlARF8A, SlARF8B and SlDAO2 is decreased in stamens from the parthenocarpic fruit (pat) mutant, which develops stamens of reduced length. Accordingly, free IAA levels decrease while IAA-Asp levels increase in tomato stamens. Collectively, our results demonstrate that GH3s and DAO1 modulate auxin homeostasis and regulate stamen development in both Arabidopsis and tomato.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 3","pages":"e70340"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12177280/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144326637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Limeng Dong, Ting Huang, Shuo Han, Xiaowen Han, Junliang Yin, Lu Hou, Yujiao Liu
{"title":"Comprehensive Analysis of Faba Bean AP2/ERF Genes Suggests Potential Roles of VfAP2-1 and VfERF-99 in Abiotic and Biotic Stress Responses.","authors":"Limeng Dong, Ting Huang, Shuo Han, Xiaowen Han, Junliang Yin, Lu Hou, Yujiao Liu","doi":"10.1111/ppl.70356","DOIUrl":"10.1111/ppl.70356","url":null,"abstract":"<p><p>The AP2/ERFs not only participate in regulating signal networks, but they also play important roles in the process of plant growth and stress response. However, systematic research of AP2/ERF in Vicia faba is lacking. In this study, VfAP2/ERF was systematically identified and their characteristics were comprehensively analyzed. In total, 145 VfAP2/ERFs were identified, which were unevenly distributed across six chromosomes, and according to phylogenetic relationships, VfAP2/ERFs could be classified into five subgroups. Cis-elements analysis showed that VfAP2/ERF promoters harbored numerous elements functionally relating to light response, plant hormone, abiotic stress response, and plant growth and development response. Expression profiling analysis indicated that VfAP2/ERFs were broadly expressed during growth and development, and were responsive to drought and salt stresses. RT-qPCR revealed that six VfAP2/ERF genes were upregulated under drought and salt stress. Inoculation assay showed that VfAP2-1 and VfERF-99 could enhance resistance to pathogens. Further research shows that VfAP2-1 and VfERF-99 positively influence ROS homeostasis, resulting in the accumulation of H<sub>2</sub>O<sub>2</sub> and O<sub>2</sub> <sup>-</sup> under abiotic and biotic stresses, which inhibited the colonization of pathogens. Additionally, VfAP2-1 and VfERF-99 could significantly increase the content of chlorophyll a, carotenoids, and total chlorophyll, suggesting their possible roles in promoting photosynthesis. This study comprehensively analyzed VfAP2/ERFs and preliminarily explored the function of VfAP2-1 and VfERF-99 in biotic/abiotic stresses and photosynthesis, which laid the foundation for deciphering their functional mechanisms.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 3","pages":"e70356"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144333775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marimuthu Kumaravel, Ganesan Karthika, Patel Prashanti, Adi Doron-Faigenboim, Amir Raz, Navot Galpaz
{"title":"Global Tissue Specific Transcriptome Analysis of Musa spp., cv. Grand Naine (AAA) Across Twelve Different Tissues.","authors":"Marimuthu Kumaravel, Ganesan Karthika, Patel Prashanti, Adi Doron-Faigenboim, Amir Raz, Navot Galpaz","doi":"10.1111/ppl.70339","DOIUrl":"10.1111/ppl.70339","url":null,"abstract":"<p><p>Untargeted trait manipulation through molecular breeding in a sterile and polyploid crop such as banana can introduce adverse pleiotropic effects. This limitation can be overcome with a precise targeted approach using tissue-specific promoters to induce the desired gene in specific tissues. As the banana plant is highly susceptible to many biotic and abiotic stresses, its defense traits must be enhanced. To generate resilient bananas that can withstand various stresses, we aimed to identify tissue-specific and differentially expressed genes through an RNA-sequencing approach. Transcriptomic analysis was carried out in 12 different developmental tissues (primary root, secondary root, corm rhizome, tip meristem, leaf sheath pseudostem, leaf blade, leaf midrib, peduncle, unripe fruit peel, unripe fruit pulp, ripe fruit peel and ripe fruit pulp) of Cavendish type banana-cv. Grand Naine (AAA). Results showed that 8098 genes were differentially expressed among the 12 tissues, 146 genes were uniquely expressed in specific tissues, and 48 genes were constitutively expressed in all tissues. Functional annotations exhibited that most of the differentially expressed genes were involved in the oxidation-reduction process (391), followed by transcriptional regulation (185) and phosphorylation (184). Gene-enrichment analysis showed that many differentially expressed genes were involved in defense mechanisms associated with phenylpropanoid (55) and terpenoid (49) pathways. The promoters of identified differentially expressed genes can be studied for transient expression with reporter genes and then in stable transformation studies, thereby avoiding pleiotropic effects in genome-manipulated bananas.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 3","pages":"e70339"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144333776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tom Dongmin Kim, Daniella Pretorius, James W Murray, Tanai Cardona
{"title":"Exploring the Structural Diversity and Evolution of the D1 Subunit of Photosystem II Using AlphaFold and Foldtree.","authors":"Tom Dongmin Kim, Daniella Pretorius, James W Murray, Tanai Cardona","doi":"10.1111/ppl.70284","DOIUrl":"10.1111/ppl.70284","url":null,"abstract":"<p><p>Although our knowledge of photosystem II has expanded to include time-resolved atomic details, the diversity of experimental structures of the enzyme remains limited. Recent advances in protein structure prediction with AlphaFold offer a promising approach to fill this gap in structural diversity in non-model systems. This study used AlphaFold to predict the structures of the D1 protein, the core subunit of photosystem II, across a broad range of photosynthetic organisms. The prediction produced high-confidence structures, and structural alignment analyses highlighted conserved regions across the different D1 groups, which were in line with high pLDDT scoring regions. In contrast, varying pLDDT in the DE loop and terminal regions appears to correlate with different degrees of structural flexibility or disorder. Subsequent structural phylogenetic analysis using Foldtree provided a tree that is in good agreement with previous sequence-based studies. Moreover, the phylogeny supports a parsimonious scenario in which far-red D1 and D1<sup>INT</sup> evolved from an ancestral form of G4 D1. This work demonstrates the potential of AlphaFold and Foldtree to study the molecular evolution of photosynthesis.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 3","pages":"e70284"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12096807/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144119503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
María Isabel Rubia, Estíbaliz Larrainzar, Cesar Arrese-Igor
{"title":"Drought Stress Modifies the Source-Sink Dynamics of Nitrogen-Fixing Soybean Plants Prioritizing Roots and Nodules.","authors":"María Isabel Rubia, Estíbaliz Larrainzar, Cesar Arrese-Igor","doi":"10.1111/ppl.70276","DOIUrl":"10.1111/ppl.70276","url":null,"abstract":"<p><p>Soybean plants are one of the most cultivated legume crops worldwide. Their ability to establish nitrogen-fixing symbiosis with rhizobium bacteria allows the reduction of molecular nitrogen to ammonium, contributing to a reduction in the dependence on nitrogen fertilizers. However, nitrogen fixation is highly sensitive to environmental stresses, such as water deficit, and the regulatory mechanisms underlying this inhibition remain debatable. In the current study, we analyzed carbon (C) allocation dynamics in drought-stressed soybean plants following the application of [U-<sup>13</sup>C]-sucrose to source leaves. Three sets of plants were analyzed: well-watered plants, mild drought, and severe drought-stressed plants. <sup>13</sup>C distribution was monitored for up to 6 h post-application. Under optimal water conditions, <sup>13</sup>C was mainly allocated to young (sink) leaves. During drought stress, transport trends changed, prioritizing C allocation primarily to the roots and nodules to a lesser extent. Metabolite profiling identified drought- and tissue-specific variations in the levels of the major C and N compounds.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 3","pages":"e70276"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12104801/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144143380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Role of Fe-Graphitic Carbon Nitride in Improving the Oil Profile, Flowering and Biochemical Attributes in the \"Shengeh\" Olive Under Drought Stress.","authors":"Rahmatollah Gholami, Narjes Fahadi Hoveizeh, Seyed Morteza Zahedi, Nadire Pelin Bahadirli, Mohsen Padervand, Petronia Carillo","doi":"10.1111/ppl.70311","DOIUrl":"https://doi.org/10.1111/ppl.70311","url":null,"abstract":"<p><p>To evaluate the effect of foliar-applied metal-nanostructures on alleviating the drought stress effects in olive trees, this study investigates the impact of Fe-carbon nitride nanostructures on flowering, oil profile, and some biochemical markers of olive trees grown under different irrigation regimes. The results indicated that drought decreased inflorescence number per branch by 45%, flower number per inflorescence by 9%, perfect and imperfect flower number per inflorescence by 16% and 7%, respectively, inflorescence length by 73%, fruit number per branch by 49%, and perfect flower number per branch by 54%. Whereas, the flowering parameters improved with Fe<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> treatment. Spraying treatments had a significant effect on fatty acid composition, whereas irrigation level and their interaction were not statistically significant. The Fe<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> treatment increased the concentrations of all investigated fatty acids. In contrast, irrigation regimes led to a decrease in C16:0, C18:0, C18:2, C18:3, and C20:0, while increasing C16:1 and C18:1. Nevertheless, the Fe<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> × 100%ET treatment numerically increased C18:0 and C18:2; whereas the Fe<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> × 75%ET treatment resulted in higher levels of C16:0, C16:1, C18:1, and C18:3. Drought stress caused a decrease of total chlorophylls by 62%, carotenoid by 96%, total flavonoid by 50%, and antioxidant capacity by 55%, while enhancing the phenol content by 115%. On the contrary, the use of Fe<sub>2</sub>O<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> increased total chlorophylls by 163%, phenol content by 148%, and antioxidant capacity by 34% as compared to the control. According to this research, the use of carbon nanostructure could represent a promising and cost-effective strategy to increase the olive tree tolerance to water deficit.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 3","pages":"e70311"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144294785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shagun Sharma, Shivanti Negi, Pankaj Kumar, Mohammad Irfan
{"title":"Nitric Oxide Dynamics in High-Altitude Medicinal Plants: Role in Stress Adaptation, Signaling, and Phytohormonal Interactions.","authors":"Shagun Sharma, Shivanti Negi, Pankaj Kumar, Mohammad Irfan","doi":"10.1111/ppl.70342","DOIUrl":"https://doi.org/10.1111/ppl.70342","url":null,"abstract":"<p><p>Nitric oxide (NO) is a pivotal signaling molecule that plays a crucial role in the high-altitude adaptation and stress tolerance of medicinal plants. Under hypoxic conditions prevalent in high-altitude environments, NO facilitates oxygen sensing, regulates mitochondrial function, and influences ethylene biosynthesis, thereby enhancing plant resilience. This review elucidates NO's modulation of oxidative stress responses through interactions with reactive oxygen species (ROS) to maintain redox homeostasis. Additionally, NO's interaction with key phytohormones, including abscisic acid, ethylene, and gibberellins, is examined, highlighting its role in hormone-mediated stress adaptation. Numerous medicinal plants adapted to high altitudes demonstrate NO's influence on secondary metabolite production, growth, and reproductive processes. The intricate crosstalk between NO and other signaling molecules, such as gasotransmitters and secondary messengers, reveals a complex network of integrative signaling pathways facilitating adaptive responses. Furthermore, advancements in NO detection and quantification techniques, along with existing challenges, are reviewed to provide insights into enhancing the understanding and application of NO dynamics in plant stress tolerance. In conclusion, this synthesis of current knowledge proposes potential biotechnological applications and future research directions to further explore NO-mediated adaptation mechanisms in medicinal plants thriving in high-altitude environments.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 3","pages":"e70342"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144326636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shun Liu, Victoria Powell, Shun-Min Yang, France Lam, Chris Bowler, Miroslav Obornik, Richard G Dorrell
{"title":"Dynamic Relocalization and Divergent Expression of a Major Facilitator Carrier Subfamily in Diatoms.","authors":"Shun Liu, Victoria Powell, Shun-Min Yang, France Lam, Chris Bowler, Miroslav Obornik, Richard G Dorrell","doi":"10.1111/ppl.70355","DOIUrl":"10.1111/ppl.70355","url":null,"abstract":"<p><p>Eukaryotic organisms, including microbial members such as protists and green algae, utilize suites of transporter proteins to move essential metabolites across cell organelle membranes. Amongst these different transporter families, the mitochondrial carrier family (MCF) is one of the most diverse, encompassing essential NAD+ and ADP/ATP translocators, as well as amino acid, sugar and cofactor transporters. They are typically associated with the mitochondrial inner membrane, but some display more dynamic localization. Here, we perform a census of predicted MCF domains in the genome of the model diatom alga Phaeodactylum tricornutum, identifying a new family of three proteins (termed here and elsewhere \"MCFc\") with strong internal sequence conservation but limited similarity to other MCF proteins encoded in its genome. Considering both phylogenetic data and experimental localization, we posit that MCFc is widespread across algae with complex red chloroplasts alongside some primary green algae, and contains multiple subfamilies targeted to diatom mitochondria, plastids, and endomembranes. Finally, using data from Tara Oceans, we identify putative roles for MCFc in diatom cells, including a possible association of the plastid-targeted Phatr3_J46742 subfamily in cellular nitrate assimilation. Our data provide insights into the evolutionary diversification of the membrane transport mechanisms associated with diatoms and other eukaryotic algae.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 3","pages":"e70355"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144369143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}